Cops Search Home of Person of Interest's Granddaughter in 1975 Disappearance of Two Sisters
07/30/2015 AT 02:50 PM EDT
Forty years ago, 12-year-old Sheila Lyon and 10-year-old Katharine Lyon went to the Wheaton Plaza Mall in Maryland to shop for Easter decorations and grab a bite to eat. They were never seen or heard from again.
Earlier this month, Lloyd Lee Michael Welch Jr., a convicted sex offender already serving time in prison for molesting a 10-year-old girl, was charged with murder in the girls' disappearance.
But officials don't believe he acted alone. His uncle, Richard Allen Welch, was named as a person of interest in the case last year, and now, police have executed a search warrant at Richard's granddaughter's home, removing various items from Amy Welch's house, according to WUSA9.
Authorities did not elaborate on what they found at the home.
Lloyd previously told police that he'd seen his uncle sexually abusing the two girls. However, he has maintained that he knows nothing about their deaths.
But an inmate in Lloyd's cell block told authorities last year that Lloyd admitted to burying the girls on a family property in Virginia.
And another man told investigators in December that in 1975 he helped Lloyd dispose of two red-stained duffel bags weighing roughly 60 to 70 lbs. apiece. Together, they tossed the bags on a fire. The man said they "smelled like death."
The girls' bodies have never been found.
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